I am probably never going to buy 6 TIE defenders so this list will never be tournament legal for me. But I was thinking the biggest weakness for a TIE Swarm if Howelrunner. Kill her and your swarm looses a ton of hitting power. So I cam up with this.
Black Squadron + Preditor x5
Night Beast
Yeah it is only 6 TIEs, you a TIE from the standard 6 TIEs + Howelrunner. But since Howelrunner is usually a little further back with an evade token I don't think you lose a lot of firepower.
Against a three ship rebel squadron you will of course probably move last, but against a 4 or 5 ship rebel squadron those points you spent on the Black Squadron shouldn't be wasted.
I am really excited to get the preditor card, I have lots of ideas for them.
Preditor seems to me what we all wanted Marksmanship and Expose to be. Since it doesn't cost an action it give a lagitamate offensive bump all the time.